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Hydrometallurgical treatment of tailings with high zinc content

Espiari, S ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1016/j.hydromet.2006.01.005
  3. Publisher: 2006
  4. Abstract:
  5. Zinc exists as smithsonite and hemimorphite in the lead flotation tailings from the Dandi mineral processing plant in north western Iran. In this research, zinc-rich tailings produced in the Dandi plant were characterized mineralogically and a leaching study was carried out to assess the effect of several parameters on the kinetics of zinc dissolution. Parameters studied included: sulfuric acid concentration, reaction time, temperature and slurry density. It was found that leaching is controlled by a single rate-controlling step with an activation energy of 23.5 kJ/mol. To overcome some of the filtration problems associated with polymerization of silicic acid, lime was added as a coagulant. The optimum pH, holding time and temperature required to maximize the filtration rate were determined. © 2006 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Activation energy ; Dissolution ; Hydrometallurgy ; Leaching ; Mineralogy ; Polymerization ; Slurries ; Tailings ; Kinetics ; Lead-zinc oxide ores ; Silica coagulation ; Silicic acid ; Zinc
  8. Source: Hydrometallurgy ; Volume 82, Issue 1-2 , 2006 , Pages 54-62 ; 0304386X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0304386X06000259